The Planck length is often confused to mean the smallest discrete unit of space, but it's more like the size of the smallest 'window' through which information

The Planck length is often confused to mean the smallest discrete unit of space, but it's more like the size of the smallest 'window' through which information can travel without becoming a black hole. The endpoints of that 'window' can be at arbitrary coordinates, so in theory you can make arbitrarily precise measurements.